package net.minecraft.entity.projectile;

import java.util.List;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Items;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.BlockPos;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.world.World;

public class EntityPotion extends EntityThrowable {
	/**
	 * The damage value of the thrown potion that this EntityPotion represents.
	 */
	private ItemStack potionDamage;

	public EntityPotion(World worldIn) {
		super(worldIn);
	}

	public EntityPotion(World worldIn, EntityLivingBase throwerIn, int meta) {
		this(worldIn, throwerIn, new ItemStack(Items.potionitem, 1, meta));
	}

	public EntityPotion(World worldIn, EntityLivingBase throwerIn, ItemStack potionDamageIn) {
		super(worldIn, throwerIn);
		this.potionDamage = potionDamageIn;
	}

	public EntityPotion(World worldIn, double x, double y, double z, int p_i1791_8_) {
		this(worldIn, x, y, z, new ItemStack(Items.potionitem, 1, p_i1791_8_));
	}

	public EntityPotion(World worldIn, double x, double y, double z, ItemStack potionDamageIn) {
		super(worldIn, x, y, z);
		this.potionDamage = potionDamageIn;
	}

	/**
	 * Gets the amount of gravity to apply to the thrown entity with each tick.
	 */
	protected float getGravityVelocity() {
		return 0.05F;
	}

	protected float getVelocity() {
		return 0.5F;
	}

	protected float getInaccuracy() {
		return -20.0F;
	}

	/**
	 * Sets the PotionEffect by the given id of the potion effect.
	 */
	public void setPotionDamage(int potionId) {
		if (this.potionDamage == null) {
			this.potionDamage = new ItemStack(Items.potionitem, 1, 0);
		}

		this.potionDamage.setItemDamage(potionId);
	}

	/**
	 * Returns the damage value of the thrown potion that this EntityPotion
	 * represents.
	 */
	public int getPotionDamage() {
		if (this.potionDamage == null) {
			this.potionDamage = new ItemStack(Items.potionitem, 1, 0);
		}

		return this.potionDamage.getMetadata();
	}

	/**
	 * Called when this EntityThrowable hits a block or entity.
	 */
	protected void onImpact(MovingObjectPosition p_70184_1_) {
		if (!this.worldObj.isRemote) {
			List<PotionEffect> list = Items.potionitem.getEffects(this.potionDamage);

			if (list != null && !list.isEmpty()) {
				AxisAlignedBB axisalignedbb = this.getEntityBoundingBox().expand(4.0D, 2.0D, 4.0D);
				List<EntityLivingBase> list1 = this.worldObj
						.<EntityLivingBase>getEntitiesWithinAABB(EntityLivingBase.class, axisalignedbb);

				if (!list1.isEmpty()) {
					for (EntityLivingBase entitylivingbase : list1) {
						double d0 = this.getDistanceSqToEntity(entitylivingbase);

						if (d0 < 16.0D) {
							double d1 = 1.0D - Math.sqrt(d0) / 4.0D;

							if (entitylivingbase == p_70184_1_.entityHit) {
								d1 = 1.0D;
							}

							for (PotionEffect potioneffect : list) {
								int i = potioneffect.getPotionID();

								if (Potion.potionTypes[i].isInstant()) {
									Potion.potionTypes[i].affectEntity(this, this.getThrower(), entitylivingbase,
											potioneffect.getAmplifier(), d1);
								} else {
									int j = (int) (d1 * (double) potioneffect.getDuration() + 0.5D);

									if (j > 20) {
										entitylivingbase
												.addPotionEffect(new PotionEffect(i, j, potioneffect.getAmplifier()));
									}
								}
							}
						}
					}
				}
			}

			this.worldObj.playAuxSFX(2002, new BlockPos(this), this.getPotionDamage());
			this.setDead();
		}
	}

	/**
	 * (abstract) Protected helper method to read subclass entity data from NBT.
	 */
	public void readEntityFromNBT(NBTTagCompound tagCompund) {
		super.readEntityFromNBT(tagCompund);

		if (tagCompund.hasKey("Potion", 10)) {
			this.potionDamage = ItemStack.loadItemStackFromNBT(tagCompund.getCompoundTag("Potion"));
		} else {
			this.setPotionDamage(tagCompund.getInteger("potionValue"));
		}

		if (this.potionDamage == null) {
			this.setDead();
		}
	}

	/**
	 * (abstract) Protected helper method to write subclass entity data to NBT.
	 */
	public void writeEntityToNBT(NBTTagCompound tagCompound) {
		super.writeEntityToNBT(tagCompound);

		if (this.potionDamage != null) {
			tagCompound.setTag("Potion", this.potionDamage.writeToNBT(new NBTTagCompound()));
		}
	}
}
